/**
 * @Author lizhenchao@atguigu.cn
 * @Date 2021/7/30 14:16
 */
public class B {
    public static void main(String[] args) {
        String s = "id,coupon_id,range_type,range_id";
    
        System.out.println(s.replaceAll("[^,]+", "?"));
    }
}
